<!DOCTYPE html><html><head>
  <title>Impossible rules (* html, * :root)</title>
  <style type="text/css">* html { background-color: red; }
* :root { background-color: red; }
p { color: green; }</style>
  <link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch">
  <link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"> <!-- bogus link to make sure it gets found -->
  <meta name="flags" content="">
 </head>
 <body>
<p><!--Replaced (p) --></p>

</body></html>